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|Rhamnus californica ssp californica|
| Rhamnus californica|
Rhamnus californica (syn. Frangula californica (Eschsch.) A.Gray), is called coffeeberry because its berries contain seeds which look like coffee beans—it is also called California buckthorn. It is a common plant native to California and southwestern Oregon.
There are two subspecies:
- Rhamnus californica subsp. californica - widespread in western California. Fruit with two seeds; twigs red; leaves with conspicuous veins.
- Rhamnus californica subsp. occidentalis - northern California and southwest Oregon, on serpentine soils. Fruit with three seeds; twigs brown; leaves with inconspicuous veins.
- R. californica 'Eve Case' - to 10 ft. tall by wide
- R. californica 'Leatherleaf' - black-green foliage
- R. californica 'Mound San Bruno' - lower and compact